Shmoop AP Language Prep? Helpful or ehhh?

<p>I'm currently doing some last week cramming for the Spanish 4 AP test and I kinda need some more practice, i was looking online and came across the Shmoop website offering a $17 preparation set. I have looked for reviews all over the place but cant find any. Has anyone bought it before? How was it ? How did it work? Let me know !</p>